package com.example.common.exception;


import com.example.common.lang.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;

/**
 * 全局异常处理
 */


@Slf4j
@RestControllerAdvice     //通过ControllerAdvice来定义全局控制异常处理，因为前后端分离异步用RestControllerAdvice
public class GlobalExceptionHandler {


    //捕获实体校验异常
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public Result handler(MethodArgumentNotValidException e) {

        BindingResult result = e.getBindingResult();
        ObjectError objectError = result.getAllErrors().stream().findFirst().get();

        log.error("实体校验异常：----------------{}", objectError.getDefaultMessage());
        return Result.fail(objectError.getDefaultMessage());
    }


//    捕获非法数据异常
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(value = IllegalArgumentException.class)
    public Result handler(IllegalArgumentException e) {
        log.error("Assert异常：----------------{}", e.getMessage());
        return Result.fail(e.getMessage());
    }

    //    捕获RuntimeException的异常
    @ResponseStatus(HttpStatus.BAD_REQUEST)           //返回400的状态码
    @ExceptionHandler(value = RuntimeException.class)  //针对性异常处理，可对每种异常针对性处理
    public Result handler(RuntimeException e) {
        log.error("运行时异常：----------------{}", e.getMessage());
        return Result.fail(e.getMessage());
    }

}
